Sinus Disease

This observational prospective clinical study aims to describe the epidemiology, management and outcome of patients with sinonasal and skull-base pathology (tumours and diseases with malignant clinical characteristics) in a tertiary otorhinolaryngology referral centre. The main questions it aims to answer are: * what is the caseload of patients with the included pathology in our centre * what are the results of management of these cases * what are the epidemiological characteristics of included patients * what is the quality of life of included patients.

Endoscopic sinus surgery (ESS) is a common otolaryngologic procedure that aims to remove the partitions that separate the sinus cavities, remove inflamed tissue, and optimize the sinuses for topical medication use. In this procedure, the surgeon will inject a combination of drugs, local anesthetics, and vasoconstrictors, to reduce bleeding and improve visualization. However, previous studies have shown similar results when injected with only saline. In this study, investigators want to determine if the injection of local anesthesic+vasoconstrictor compared to no injection at all makes any difference in improving the surgeon's visualization during an ESS.